A mass die-off of three-spined sticklebacks (Gasterosteus aculeatus L.) caused by parasites.
D000818:Animals; D002590:Cestode Infections / Q000662:veterinary*; D003445:Crustacea; D004478:Ectoparasitic Infestations / Q000662:veterinary*; D005399:Fishes; D014201:Trematode Infections / Q000662:veterinary*